the ntsb joins the coast guard in investigating the collision on monday by an oil tanker in a bay bridge tower. abc7 has several new developments in the crash session to report. the coast guard says it warned the ship by radio it was in danger and the coast guard now is calling it a major marine casualty bass more than half a million in damage. this is a look from treasure island of the we ship, "overseas raymar" which is anchored in san francisco bay. we were over ahead when the coast guard investigators were on board yesterday interviewing the bar pilot, guy kleess, who was at helm when the accident occurred. he passed an alcohol test. a drug test result is pending. we will have more in 30 minutes. >> political leaders are tackling the issue of gun violence amid signs america is at a tipping point for taking action. vice president biden is holding high-level meetings today with victims groups, the n.r.a. and gun safety organizations. we are live in washington, dc, with the latest. >> good morning, kristen. the obama administration does not want to lose momentum for new gun legislation.